Ultra-High Input Impedance AC Unity Gain Amplifier

2015-01-04 06:26

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This is an ultra high input impedance AC unity gain amplifier circuit. This circuit is used to get unity gain from ultra high input impedance AC. Here is the circuit:Because we can’t reduce input capacitance of this circuit, so we use the 2N4416 which has low capacitance. It is operated as a source follower with bootstrapped gate bias resistor and resistor . [Source: National Semiconductor Application Note]

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